55030257 has 6 divisors (see below), whose sum is σ = 79488162. Its totient is φ = 36686832.

The previous prime is 55030253. The next prime is 55030259. The reversal of 55030257 is 75203055.

It can be written as a sum of positive squares in only one way, i.e., 48108096 + 6922161 = 6936^2 + 2631^2 .

It is not a de Polignac number, because 55030257 - 2² = 55030253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55030257.

It is not an unprimeable number, because it can be changed into a prime (55030253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3057228 + ... + 3057245.

It is an arithmetic number, because the mean of its divisors is an integer number (13248027).

Almost surely, 2^55030257 is an apocalyptic number.

It is an amenable number.

55030257 is a deficient number, since it is larger than the sum of its proper divisors (24457905).

55030257 is a wasteful number, since it uses less digits than its factorization.

55030257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6114479 (or 6114476 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 55030257 is about 7418.2381331419. The cubic root of 55030257 is about 380.3649702208.

The spelling of 55030257 in words is "fifty-five million, thirty thousand, two hundred fifty-seven".